cubicweb-slickgrid #17049375 Make slickgrid plugin options customizable [in-progress]

Useful e.g. for passing a bodyElement for cellexternalcopymanager, otherwise the paste operation does not work on a grid in a modal

prioritynormal
typeenhancement
done in1.2.0
closed by<not specified>
patch[formwidget] Pass plugins options to SlickGrid plugins (closes #17049375) [in-progress]